How much does a natural gas generator cost?
How much does a natural gas generator cost?
$700 – $1,700 portable generator cost (unit only)
$1,000 – $4,500 portable generator (connected to house)
$6,000 – $11,000 whole-house generator (with installation)
Natural gas generator cost
The cost of a natural gas generator ranges from $1,000 to $4,500 for a small portable generator suitable for essential appliances. A whole-house natural gas generator costs $6,000 to $11,000 with installation, based on the generator's power output, features, and brand. Advanced features like remote monitoring and automatic transfer switches cost more.
| Size (kW) | Supports | Average unit price* | Average installed cost |
|---|---|---|---|
| 2 – 5 | One appliance and a few lights | $700 – $1,700 | $1,000 – $3,200 |
| 7 – 10 | Essentials (fridge, lights, some outlets) | $2,000 – $3,000 | $2,400 – $4,500 |
| 13 – 16 | Small to medium homes | $3,000 – $5,000 | $6,000 – $10,000 |
| 17 – 20 | Medium to large homes | $4,000 – $6,000 | $7,000 – $11,000 |
| 22 – 25 | Large homes with heavy power needs | $4,500 – $12,000+ | $9,500 – $24,000 |
| 30 – 48 | Mostly for commercial applications | $10,000 – $16,000 | $15,000 – $28,000 |
*Not including installation
Cost of natural gas generator
Installing a natural gas generator isn’t cheap, but the security and convenience of reliable backup power make it worth the cost for many homeowners.
Generator price
The price of a natural gas generator ranges from $700 to $3,000 for a portable unit that can operate a few essential appliances and outlets. A larger whole-house generator costs $3,000 to $6,000 to power an entire home up to 3,000 SF in size.
Factors that impact the unit price include the generator size, brand, and overall unit quality. Investing in a higher-quality generator ensures greater reliability, longevity, and potentially, more advanced features like remote monitoring or quieter operation. Established brands often come with better warranties and customer support, providing added peace of mind.
Installation cost
Professional installation is crucial for safety and optimal performance. Costs range from $400 to $1,500 to hook up a portable unit or $3,000 to $5,000 to install a whole-house generator. These costs cover labor and any necessary modifications to your existing gas and electrical systems.
Long distances from the gas line or generators exceeding 20kW can result in installation costs as high as $5,000 to $12,000+. Complex installations may involve additional expenses for trenching, running new gas lines, or upgrading electrical panels.
Natural gas generator installation cost factors
Beyond the price of the generator and installation, several elements influence the final cost of a whole-house generator installation. The following table details average costs, but your specific expense will vary depending on the complexity of the installation, your location, and the specific contractors you choose.
| Factor | Average cost |
|---|---|
| Home energy assessment | Free with installation |
| Labor charges for electrician | $40 – $100 per hour |
| Automatic transfer switch installation | $600 – $2,500 |
| Electrical wiring | $6 – $8 per foot |
| Gas line installation | $12 – $25 per foot |
| Concrete pad | $150 – $400 |
| Permits | $80 – $450 |
A home energy assessment often comes free of charge when you purchase a generator and installation package, helping determine the appropriate size for your needs.
Labor charges for an electrician can vary depending on experience and location, so obtain multiple quotes.
The cost to install an automatic generator transfer switch is $600 to $2,500, which turns on a standby generator automatically during a power outage.
Electricians calculate wiring costs per foot, so the distance between the generator and your home's electrical panel impacts the overall expense.
Gas line installation prices depend on the length of the line needed and any obstacles encountered during installation.
A concrete pad costs $150 to $400, providing a stable and level surface for your generator, protecting it from ground moisture and shifting.
Most municipalities require permits to ensure the installation meets local safety and building codes.
Natural gas whole-house generator cost to run
The running cost of a natural gas generator depends primarily on two factors: the price of natural gas and the generator's load (how much power you're using). Natural gas prices fluctuate, but on average, you can expect to spend $10 to $40 per day to run a typical home generator during a power outage.
Several factors impact this cost:
Generator size: Larger generators consume more fuel, even when idling.
Load: Running more appliances simultaneously increases fuel consumption.
Natural gas prices: Prices vary by location and supplier.
Generator efficiency: Newer models often have better fuel efficiency.
Be aware that running costs can be significantly higher during periods of peak demand when natural gas prices tend to increase.
Maintenance costs
To ensure your natural gas generator operates reliably when you need it most, regular maintenance is essential. Annual generator maintenance costs $200 to $650 per year, depending on the scope of work and the service provider.
To maintain peak performance, perform these essential maintenance tasks regularly:
Change the oil and filter to optimize lubrication and cooling.
Replace spark plugs to prevent starting issues.
Clean or replace the air filter for proper combustion.
Inspect the battery to ensure reliable starts.
Test the system underload to verify functionality.
Inspect the gas line to prevent leaks and ensure safety.
Check and clean critical components like the air cooler and regulator.
An annual maintenance contract with a generator service company provides peace of mind and potentially saves money over time by avoiding costly repairs.
Natural gas generator FAQs
How long will a generator run on natural gas?
A natural gas generator can run for days, weeks, or even months, as long as there is a continuous supply of natural gas. Unlike gasoline or propane generators that require refueling, natural gas generators connect directly to your home's natural gas line, providing a virtually limitless fuel source.
Is a natural gas generator noisy when running?
Natural gas generators do produce noise, but many models have noise-reducing features. Look for generators with sound shields or enclosures to minimize noise levels.
Can a propane generator run on natural gas?
No, a generator designed to run on propane cannot run on natural gas without modifications. The generator's fuel system is designed specifically for one fuel type, and using the wrong fuel can damage the engine or create a safety hazard.
Can a natural gas generator run on propane?
Similarly, a natural gas generator typically cannot run on propane without modifications. Conversion kits are available for some models, allowing them to switch between natural gas and propane, but consult a professional before attempting any fuel conversions.
Getting estimates from generator installers
Follow these tips when contacting home generator installers near you:
Contact at least three different installers to compare pricing and services.
Ensure each estimate clearly outlines all costs, including the generator itself, installation labor, permits, and any additional materials.
Request an in-person assessment of your property. This allows the installer to accurately assess the complexity of the job and identify any potential challenges.
Understand the warranty coverage for both the generator and the installation work. Inquire about available service plans.
Ask for references from past customers and check online reviews on HomeGuide and Google to gauge the installer's reputation.
Confirm the installer is properly licensed and insured to perform electrical and gas work in your area.
Ask for an estimate of how long the installation will take, from start to finish.
Questions to ask a generator installation company
These questions will help you assess the installer's qualifications, understand the project scope, and ensure a smooth and successful installation:
Are you licensed and insured to perform gas and electrical work in this area?
Do you have experience installing natural gas generators of this size and brand?
Can you provide references from past customers?
What is the estimated total cost of the project, including all labor, materials, permits, and fees?
What size generator do you recommend for my home's needs, and how did you determine that?
How long will the installation process take?
What type of warranty do you offer on your installation work?
How do you handle emergencies or after-hours support?
What are the ongoing maintenance requirements for the generator, and do you offer service plans?
Using our proprietary cost database, in-depth research, and collaboration with industry experts, we deliver accurate, up-to-date pricing and insights you can trust, every time.